光伏电站系统标准能效比的修正方法研究

Study on correction method of CPR of PV power station

为减小光伏系统标准能效比(Corrective Performance Ratio,CPR)的计算误差,降低运维成本,提高电站管理水平,基于光伏组件工程简化模型计算考虑组件温度、辐照度变化的电能变化量,并利用该变化量计算CPR。将该方法运用于实际电站,对比行业标准NB/T 10394-2020的计算方法并分析其差异,结果表明,该方法的计算结果与行业标准的计算结果在日总辐照量大于6(kW·h)/m^(2)时差值小于2%,且在日总辐照量小于6(kW·h)/m^(2)时,可减少因组件自身特性造成的误差,相比于行业标准NB/T 10394-2020的计算方法更具优势。

In order to reduce the calculation error of the standard energy efficiency ratio(Corrective Performance Ratio,CPR)of photovoltaic systems,reduce operation and maintenance costs,and improve the management level of power plants,a simplified model of photovoltaic module engineering is used to calculate the changes in electrical energy considering changes in module temperature and irradiance,and the CPR is calculated using this change.Applying this method to actual power plants,comparing the calculation methods of the industry standard NB/T 10394-2020 and analyzing their differences,the results show that the difference between the calculation results of this method and the industry standard is less than 2%when the total daily irradiation is greater than 6(kW·h)/m^(2),and when the total daily irradiation is less than 6(kW·h)/m^(2),it can reduce errors caused by the inherent characteristics of the components,which is more advantageous compared to the calculation method of the industry standard NB/T 10394-2020.